quadrilateral & quadrilateral@@
There is a quadrilateral.The points(I,J,K,L,M,N,O,P) partition AB,BC,CD,DA into same length.Points(E,F,G,H) are the point of intersection.

Move points(A,B,C,D) to find the geometric quality of the yellow areas.
@You can also move points (A,B,C,D) on CABRI.

Download CABRIU data (d55) from here.